Robertson, K., Howard, C., & Robertson, W. (2015). Strong and kind: And other important character traits your child needs to succeed. Thomas Nelson.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Robertson, Korie, Chrys Howard, و Willie Robertson. Strong and Kind: And Other Important Character Traits Your Child Needs to Succeed. Nashville, Tennessee: Thomas Nelson, 2015.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Robertson, Korie, et al. Strong and Kind: And Other Important Character Traits Your Child Needs to Succeed. Thomas Nelson, 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.